The focus, of course, will be on Apple's mobile and desktop operating systems -- the lines between which have been blurring as Apple seeks to give users the same experience regardless of device. With the newest version of OS X, called Mountain Lion, Apple is bringing many iOS features to the Mac.

"We have a great WWDC planned this year and can't wait to share the latest news about iOS and OS X Mountain Lion with developers," Philip Schiller, Apple's senior vice president of worldwide marketing, said in a statement. "The iOS platform has created an entirely new industry with fantastic opportunities for developers across the country and around the world."

The event will feature more than 100 technical sessions presented by Apple engineers.

At last year's WWDC, Apple unveiled iCloud, iOS 5, and some features of the earlier Lion version of Mac OS.

Update 7:31 a.m. PT: And just like that, Apple now says that tickets to WWDC 2012 are already sold out.

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About the author

Jonathan Skillings is managing editor of CNET News, based in the Boston bureau. He's been with CNET since 2000, after a decade in tech journalism at the IDG News Service, PC Week, and an AS/400 magazine. He's also been a soldier and a schoolteacher, and will always be a die-hard fan of jazz, the brassier the better.
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